Oh Huckleberry, I will miss you so

Presidential candidate and South Carolina Sen. Lindsey Graham has "had it" with Donald Trump.

After Trump undermined the military service of Graham's longtime colleague Sen. John McCain, Graham had a clear message for his GOP rival.

"I don't care if he drops out. Stay in the race, just stop being a jackass," Graham said Tuesday on "CBS This Morning."

Graham, who recently retired from the Air Force reserve, said the attention surrounding Trump is "turning into a circus."

"I'm looking for him to be a responsible member of the 16-person primary and stop saying stuff like this," Graham said. "The world is falling apart. We're becoming Greece. The Ayatollah's on the verge of having a nuclear weapon, and you're slandering anybody and everybody to stay in the news. You know, run for president, but don't be the world's biggest jackass."

Speaking at his first campaign rally in South Carolina on Tuesday, Donald Trump addressed his critics and fellow Republican presidential candidates calling for him to step out of the race.

He specifically fired back at Sen. Lindsey Graham's comments calling Trump a "jackass" yesterday by giving out his personal cell phone number.

Keeping in line with his obsession over who is and who is not smart, Trump said of Graham, "He doesn’t seem like a very bright guy. He actually probably seems to me not as bright as Rick Perry. I think Rick Perry probably is smarter than Lindsey Graham."

Other lowlights included in the near 45-minute stump speech include, "If you can't get rich dealing with politicians, there's something wrong with you" and "I'm the most militaristic person ever."